View Compilation Error

0_0_38684608_30819.cpp: In function 'int main()':
0_0_38684608_30819.cpp:211:9: error: 'i64' was not declared in this scope
  211 |         i64 ans = 0;
      |         ^~~
0_0_38684608_30819.cpp:220:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
  220 |                 ans = (ans + C(cnt, 4) * C(cnt_i - 4, 2) + C(cnt, 4) * C(cnt_j - 4, 2)) % mod;
      |                 ^~~
      |                 abs
0_0_38684608_30819.cpp:222:22: error: 'ans' was not declared in this scope; did you mean 'abs'?
  222 |         std::cout << ans << '\n';
      |                      ^~~
      |                      abs